more from Edwin D. Mares

### Single Idea 18793

#### [catalogued under 5. Theory of Logic / A. Overview of Logic / 6. Classical Logic]

Full Idea

The problem with material implication, and classical logic more generally, is that it considers only the truth value of formulas in deciding whether to make an implication stand between them. It ignores everything else.

Gist of Idea

Material implication (and classical logic) considers nothing but truth values for implications

Source

Edwin D. Mares (Negation [2014], 7.1)

Book Reference

'Bloomsbury Companion to Philosophical Logic', ed/tr. Horsten,L/Pettigrew,R [Bloomsbury 2014], p.208

A Reaction

The obvious problem case is conditionals, and relevance is an obvious extra principle that comes to mind.